... ultrasonic sound ==> 超声 ultrasonic source ==> 超声源 ultrasonic space grating ==> 超声空间光栅 ...
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piezoelectric ultrasonic source 压电超声源
ultrasonic power source 超声波电源
ultrasonic signal source 超声波信号源
The traditional PZT, however, is not the ultrasonic source with high efficiency because of the serious non-coupling phenomena between air and ordinary piezoelectric material.
但由于传统的压电传感器存在着空气与普通的压电材料之间严重不耦合现象，所以压电传感器并不是高效率的超声源。
The acoustic source of plane circular pistons with the radiating transient pulse wave finds wide application in the ultrasonic inspection and test.
幅射瞬态脉冲波的圆形活塞声源在超声检测中得到广泛应用。
The rule of the ultrasonic wave propagating from its source to the sensor is gained.
研究了超声波在变压器内部的传播规律；
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